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Comment by simonswain | Hacker News Reader

I did something similar, but with combat - ships, lasers and missiles.

There are a couple of variations, and some tweaks like the ships accelerating perpendicular to the planets so they don't crash land.

http://codepen.io/simonswain/full/ftEjD/

http://codepen.io/simonswain/full/CeHmh/

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Amazing!

I have a non-combat version in 3d. Now I know what mine is missing. https://www.youtube.com/watch?v=73O8aDN41sU

Very cool. I notice that many ships tend to get stuck on the edge of the map though. Maybe make it so they loop back around to the other side of the map?

> Maybe make it so they loop back

That's be a toroidal spacetime surface, wouldn't it? Would gravitational influence also have to "loop around" the borders?

If not, you might get some very interesting effects if a mass is near the edge of the map.

Thanks. Yeah, there are a couple of glitches in there. The ships bounce off the edge of the screen, and smaller ships run from bigger ones -- combined, that makes them crawl along the sides. Looping around is a good idea, or I'm wondering if there could be some kind of log scale to distance the further out from the centre the ships get. I did a variation a while back with a star in the middle that could be tweaked for that (click to add a ship). Mind you, the gravity from the star pretty much takes care of that problem.

http://codepen.io/simonswain/full/cKejC/

That was great. COngrats!

That is really cool.

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